Mining apparatus



Nov. 16, 1943. c. F. osGooD MINING APPARATUS Filed July 16, 1940 V 3 Sheets-Sheet l ...IIIIII ...IIIIII lala-nlm Nov. 16, 1943.

c. F. osGoQD 2,334,576

MINING APPARATUS Filed July le, 1940 3 Sheets-Sheet 3 "1,..4 "lumi" A.; ,4. www

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Patented Nov. 16, 1943 APPllna'ruS. 'V'. ff

Charles'FQsgood; ClaremontQN; Hg; assignojth `j 15' "j Sullivan Machinery Comnimyh'acorporatie!if01'-` Massachusetts paramount-1e; 194e, Seiiamajaiana'"' fig; l.

' Claims.

This invention relates to mining apparaten and more particularly ,to improvements in coal mining apparatus of the combined kerr outtlnganddrill.- ine type vfor cutting kerfs and fof drillins blast holes in a coal seam..4 f

An object ofthisinvention is to provide an improved coal mining. apparatus "Another ole--y ject is to provide-an improved coal mining apparatus of the combinedkerf. cutting andV drilling type whereby blast .holes may be drilled in a coal sean?- by drilling means .associated with the kerf cutting means. Yet another obiect, is to provide an improved coal drillimg means of.-

type particularly adapted with a ker-f cutting machine whereby `Mil-St. holes! mail be. dlilledm the coal at points spaced -trom the kerf out by the korf Cutting means. .A lllrtherlobjeot 'to-PTO' videan improved drillingmeans. associated with a coal cutting machine og the top cutting type whereby blast holes may be drilled in the coal face below Vthe cut therein and in, djacency to the mine floor. A further object isto provide an improved kerf cutting and drillingapparatlls have ing improved means for mounting the drilling means on the coal cutting maQhne, whereby `the drilling means may. beadjusted into different drilling positions witnrespect to the kerf cutting means. A still further object is to provide in a coal cutting machine of the combined horizontal and `shear cutter type, vanl improved drilling means, whereby blast holesvmay be drilled inthe coal face at various locations withy respect tothe horizontaland vertical keris'cut .by the keri cutting means.l AYet anotherV object to` provide, in a coal mining apparatus of the adjustable-korf cutter type having a kerf cutter adjustable into either horizontal .bottom orl top cutting positions; an improved Vdrilling means tor ldrilling topholes during the bottom cutting operation and, ,for drill ing bottom holes during the top cuttingoperatlon. A still further object is'w provide, in acoal. Clit.- ting machine of the. so-called funiversall type having a rotatable Glitterhead for adjusting .the kerf cutter into horizontal top and bottom cutting positions above and below the head axisandvertical shearing positions at either side of theliead axis, an improved drilling means whereby blast holes may be drilled in the. ooalfaec at .various locations in any cutting position of the Keri cutter-- Still another object is to Provide. an. improved coal drill Vmcmntedin .en improvedvmannor on aeoel cutting machine,l :whereby drill maybe ad iusted. .into viiicnnit drillin. poutions about an axis coincident withtlie axis. ci, rotation oitlic rota-table outterliead. A furtherobiect is to provideanimurovedfleaeffor mountin tile dr-lllzon the rotatalvle; cutter. head independently of the kjerf cutterfwlierebythe drill mar be adjusted,

drillingpositionsaliout the axis; of cutter helupon rotation.- offytlie. cutter headi, .into dliier'ent tacoma still mrthei object, ntopro ide-.an mi# provedcoal drillliaving an improved 'ustalile euppcrtincstrueture whereby, tnedr -ma he readily adiusted linto differ, .jt drilling Positions flledMaroh 2Y 1937i now. matured into Patentt`l5lo-- tenerla; 194.0.

2.,218g4-92rgranted l In the acccmpan .drawings ih reaxe shown foriiurposes oi `ill.llstlrittion. 'tiro forms whichl .the

invention may'. assume in practice..

In these draw u Y t mining apparatus lll Whi'll @n.lllllstative IQllnof the Yimproved drilling meanslisjlricomoratedf. i. A Fig.. 2 isa elfde elevational view of. the. coalriiin: ing apparatussllownlniFlerl.. ,l

rient le a. iraenientaryjplan ,vlcvt'oitlle lor: Ward portion` oi the mining :apparatussliown in Fig- 1 and. showing various adjusted positions of the improved 'drilling.nlieans2 Fic-4 is a detallseotionalview tiallir on line! of Fig.. 5-

taken. substani Fig. v5 is'ianerilarged detailverticalsectional i 'View' taken sdio'staritiauy online lei-2 5 errug., 1.

"FlgL-' is Hane'nlarged detail 'sectionalview taken substantiauycn une c-ccfj-Fiez; Y t

flfig; Tis an y'enlarged vertical sectional view takensubstantiallyon line 'l-1 of Fig.-1. i

"Fig, 8 is an 'enlarged'detail Aview in longitudinal vertical section taken substantially on line #+8 ofiFlg. 1. f Fig. `9 is? a fragmentary side elevational view of the forward portion oftheamininglapparatus showninfFig..-2, illustrating a modified form of the improved drilling'means. Y

Figs. 1li-,and v11 are .diagrammatic-views'showme the. coat mining apparatus in. operating posi,-

tion. in a mine. entry, illustratingdiffcrentad iusted positions cf the. improved drilling ineense I nV lectin;` illustrativc:A c..iitlic .liiner,ittY of the improved Y.drilling means., the same .is associated with e coaleuttina machine of. the. combined horlzonf tel and shear cutter type commonly knownese "funiverselr track cutter2 although, it will be .evi-

base I mounted on wheels 2. adapted to travel along a mine trackway 3'laid on the mine floor. Mounted on the base, in overlying relation thereon, is a horizontal turntable 4 journaled for rotation in an annular frame 5 adjustablyV supported by three screw pedestals 6 mounted on the base. Supported on theV turntable and yoverlying the annular turntableI beaingyframe 5 at.

the forward end of the base, is a horizontal arm structure 1 on which is supported a cutter-carry--,

ing-head 8 rotatable about a liorizontalaxis extending longitudinally of the arm structure "I, Supported bythe rotatable cutter-carrying-head 8 is a transverse l,guiding frame 8, vinV which ls slidably guidedv a supporting frame I; and pivotallyvrmou'nted on' this* supporting; frame for swinging movement about an axisat right angles to the 'head axis a plane'kerf cutter` I I.l This kerf cutter :isf in the fornrof a narrow `elongated plane cutter vbar I2 having guided for circulation about its' marginali endless cutter chain f3.1 As shown inFig.f8, the (rotatable cutter-carryinghead 8 hasganannular neck bearing portionE I4v journaled for rotation inlafbearingframe I supported bythe arm vstructure "I, A`s` `fully'described in the Patent No.'2,007,900 above referred to supported .by Ath'eturntable 4is `a motor, I6 having itsp'ower shaft connected through transmission gearing, including 'a horizontalshaft I1 .journaled within; the arm structure I, a itransmission shaft {I8 Vand intermeshing ,spur gearing I V9, for connecting' thesliaftsl'I` andV I8 in driving jrelation, and the shaft vIl! is operatively connected to the cutter chain' feo'r'jdriving thelatter, and the shaft I'Idrives gearingj'comprising an internal `gear 20 'secured to l the Vannularbearing frame I5, for rotatingV the' cutter` head. Also driven through the'transmission shaft I8 is the mechanism for adjusting thesliding frame I0 along its guiding frarnell relative to the cutter head frame for adjusting theA kerf cutterv into parallel'cuttin'g planes toward land from the head axis. -Supported ony the truck.v frame is a rn'otor 2| having its power shaft connectedv through transmission mechanism" arranged within )a transmission housing 22 for driving l the4 ltruck wheels to propel'the apparatus along the mine trackway and*fortadjustingwthe screw pedestals 6 for effecting vertical adjustment and universal tilting of the turntable 4 with respect to' the portablebase., Asiully describedgin .the Patent No. 2,007,900 mentioned above, this coal mining apparatus is capable of cutting horizontal -kerfs at the iioor and roof levels and horizontalkerfs at any intermediate level, and parallel `vertical shear kerfs ateither side of the head axis; and in Aany adjusted position o1" the 'Ekerf'V cutter, the apparatus may be operated tosump the `kerf ter arcuately in Yitsnplane andto withdraw the kerf'cutterfrom the coal seam in accordance As the vspeciiic` 'structure ofthe coal mining apparatus doesl'not Ventery into this invention, other than-the particular cooperatiorithereof with the drilling means, and 's'fully described in the above mentioned Patent No.. 2,007,900, further 'viding'ia journal for the turntable.

detailed description thereof is herein unnecessary.

Now referring to the illustrative embodiment of the improved drilling means shown in Figs. l

to 7, inclusive, it will be noted that .the drilling means, generally designated 25, is supported by the rotatable cutter head 8 at the side of the latter opposite from the cutter bar and wholly independently of the icutter bar, so that when the cutter bar is in top cutting position the drilling means is supported beneath the cutter head and when the cutter bar is in bottom cutting position the cutter bar is supported above the cutter(head2Av Mounted for rotation on the cutter headgtrame-about an axis alined with the pivotal axis fof the cutter bar I2, is a turntable 26, a frame v2'! secured to the head frame pro- The turntable may be locked in its adjusted position to the frame 21 and cutter head in any suitable mannerfsuchfas by a locking screw '28 provided withan 'operating handle 29 yand engageable with-fthe turntable. swivelled at 30 on the turntable 26, onan axisV atright` angles tothe turntable axis, is a support 3l carrying lan elongated arm"32 on whichf'the drilling means, generally designated-HAS mounted in a manner to Vbe later described. The swivelled support v3|'may be locked in its adjusted position relative to the turntable" 26 by a clamping means, generally designa-ted 33,' shown in Figs.4` and 5, andthe drilling means maybe clamped to a support 34 at the outer extremity of the arm V32 by similar Aclamping vrneanspgenerallyFfdesignated 35. As shown in Figs'. 4 and'5; the turntable 26 has an upstanding projectionSG, and keyed to this projection isa shaft`3'I arranged with its axis vcoincident with' the jpivotal'axis 30. The support 3I has spaced projections 438 journaled at 39 on the 'shaft'3'l so thattheQarm may be swung about its' pivotal mounting on the turntable into different angularly related"p`ositions with respect thereto. 4The farm support "3| ymay be locked in adjusted position byfa clamp-member 40 splined tofthe shaft 3I and having its-inner surface serrated for engagement with' the serrated outer as shown inY Fig. 6,A friction locking plates 46 in- `cutter within the coal seam, swing the kerf cutterposed between the ,opposite faces of a bearing 'lug "41 byfwhich the drilling means is supported,

and passing through apertures in bearing lugs 48 on the vSupport 34 `and the locking plates, is a shaft 49'leyed to one of thebearing lugs 48 and having a threaded end 50 'on which is threaded an `adjusting nut 5I provided with an operating handle'52; f When the nut 5I` is tightened, the platesa're pressed together frictionally to hold the parts inA adjusted position. The plates, if

desired, may be serrated to provide for lm holding of the parts. The' bearing lug 41 is integral with-a support 53 onV which drilling means is mounted, andthis support i's swivelled at 54 on the shaft 49.v vThe drilling-means-support 53 provides a circular bearing recess 55 in which is rotatably7` mounted an :annular bearing flange 56 on a casing 5110i the drillingmeans. The

flange itis-.retalnedI-within'the-bearing recessby 'means of an annular ,retaining ring '.58 secured tothe swrivelletlfsinoportal.` l Any-suitablelocking means :maybe employedforlocking the sufi-yelled drill casing J to the support 53, .suchasaclamping screw :59 having an operating .handle 60 and engaging the serrated outer surface, 6.1 of the annular bearing ange 5.6.

The coal drilling means Y maybe of'anyconvent-ional and well known design and, in `this instance, comprises a motor 52 .supported 'by the drill casing Stand `havingA `its power shaft coupled to a drive shaft. suitably'journaled within the drill casing. Keyed tothe shaft63. are spur gears 6I .and 465 of' different tooth ratio meshing with 'gears 616 and t1 respectively. The gears $6 and-i1 are connected in driving vrelation with the drill feeding and rotation mechanism under the cont-rol' .of friction clutches, in theA 'same general manner as that-disclosedV in the Holmes Patent.1,903,658, patented April 11, v1933. The drill rotating and feeding stem 68 carries a chuck 69. for receiving Vvthe shank of'a usual augerdrill steel 1.0 (see Fig." 6I). When both clutches of the drill feeding and rotation mechanism are applied,

they drill steel may be fed forwardly at a. slow drilling speed, and when one or the other of the clutches is released, thedrill steel=may be fed either forwardly or rearwardly at a relatively high positioning speed.

Inthe form of the invention shown in Fig. 9, the drill supportingv structure and drilling means are essentially the same as those abovedescribed with the exception that'extensible powerdevices are provided for` adjusting the arm and drill supportl about their "respectivepivotal axes. These power devices preferably comprise hydraulic cylinder and? piston devices -ll and I2 'to which liquid under pressure may beiv supplied from any suitable source.` The cylinder and'piston device Tl' has its cylinder pivotally'connected at 13 to the support l3| 'and its piston rod 14 pivotally connected at 'l5 lto the swivel support 53. The cylinder and piston device 12 has its cylinder pivotally mounted at 'I6 on vthe turntable 26 and its piston rodll pivotallyconnected at 'I8 to the outer end of the arm 32." By operating these cylinderand piston devices 1| and "I2, the arm and drill support may be swung into different adjusted positions-about their respective pivotal axes, and when the liquid is trapped within the cylinders the parts are locked in their adjusted positions. The provision'of the vpower adjusting devices for effecting adjustment ofthe drilling means-eliminat the necessity of manipulation of the relatively heavy drill parts, thereby aiding inthe setting up ofthe drill; Otherwise this form of the invention is the same as that above described.

The mode of operation of the improved mining apparatus will be clearlyapparent from the description given. The ,drilling means may be transported about the mine from oncworking place to another while the drill isresting on the top of the turntable or in any other convenient position. When the working place is reached, the cutter-carrying-head, Bof the coal machine may be adjusted into pQsiticn on the cutter bar l2 in any desired horizontalv or vertical cutting` planes between the mine. roof and mine floor and between the ribs of the. entry,and the cutter Abar may be sumped in. swung arcuately about its Plane and withdrawn from the coal seamv in ac.- cordance with the arcwall methode! cutting, in the manner well known tothose skilled iu the. art.

Whenlt is desired to cut a horizontal kerf at or near-the levelo! the minefloor. the ycutter head l maybe. disposed in the position shown in Fig. 2 and, the bar adjustingY mechanism .maybe operated to adlut the sliding frame l0 downwardly along the guiding frame 9 to lower. thecutter balY into its bottom `cutting position. f During bottom Cutting, the drill is disposed in the position shown in Fig. 10 above the cutter head1 and may be adjusted to drillV top holes in the coal face at any desired location at or near the roof level and in the ribs. When it is desired to cut Va horizontal kerf at or near the roof level, the cutter head 8 ofthe coal cutting machine may be rotated about its axisrto locate the cutter bar lin horizontal top cutting position above the axis of head rotation. During top cutting,the drill is disposed beneath the 'cutter head,as shown in Fig.

11, and may beadjustedto drill bottom holes in the coal face at any desired location at or near the 136.017 leveland inthe ribs. If desired, the screw pedestals 6 ofY-the turntable supporting meansof the coal cutting machine may be adjusted to. elevate theturntable to provide more space beneaththe cutter head; therebyV to facili- Y tate adjustment of the drill supporting 'structure during bottom hole drilling. By the provision of the swivelled supporting structure for the drill, thelatter may beadjusted into positions `to drill blast holes in the coal' face .at different inclinations orin parallelism at different locations and in.` either ribyand when the cutter head is turned into shear cuttingposition, holes may be `.drilled in the coal face at any desired point .at either side of the verticalkerf, at ornear the rooflevel or at or near the floor level. f

As airesult of this invention, it

combined kerf cutting and drilling typeis provided for cutting kerfs and-drilling blast holes at anygdesired ,locationin the coal seam. further be 4evident that an improved coal mining apparatus ofthe combined kerf cutting and drilling type is provided, having drilling means mounted on the coal cutting machine, whereby blast holes mayfbe drilled in the. coal face vat points spaced from the kerl? cut by the kerfV cutting means. Itwill still further be evident that by the `provision of theimproved adjustable supporting structure for the drill and the'improved manner of mounting the drill on the rotatable cutter head of the coal cutting machine, it is possible quickly to adjust the drill. to drill holes at any. desired location .in the coal face and in either rib of the mineentry. Other uses and advantages of the improved coal mining apparatus will-be' clearly apparent to thoseskilled in the arti f Y i Whiley there are in thisfapplication specically described 'two formsv whichV the invention' may assume in practice, it will be understood that these forms ofthe same are shown yfor purposes will be noted.V thatan improved coal mining .apparatus of the f It Will y ting al kerfV nearlthe mine roof, said cutter yadjusting means including a cutter supporting and adjusting element vmounted at the front end of the machine in adjacency to the rearward end of said kerf cutter Y`and adjustable to yposition said'kerf cutter as aforesaid, a coal drill, and a; supporting structure for wsaid drill mounted lon said supportingand adjusting element for supporting said drill wholly independently of said kerfl cutter, said supporting'structure being adjustable concurrently with-"said supporting and adjusting element during adjustment of said kerf cutter as aforesaid'to position said drill above the plane of said kerf cutter when the latterlis in its `l`bottom cutting position and'toy position'- -said drill below the plane of s'aidkerf 'cutter 'whenthe latter is v'in its top cutting position',s'ai`d coal drill in either of aforesaid supportedposition's being adapted `to drilll horizontal blast holes inf-the coaliace. l'

2. In a mining apparatus,in combination; a coal cutting machine having a cutter-head rtat'able about ka horizontal axis and carrying 'a kerf cutterl for rotation therewith about the axis of head rotation into'diiferent cutting planes for cutting kerfs at different locations' in a' coal face, a coal drill, andmeans for mounting said drill on said rotatable cutter head independently of any support by said kerf cutter, said drill mounting means supporting said drill on said cutter head f or concurrent adjustment 'therewith about the axis of head rotationinto different vdrilling positions to enable said drill toidrill blast holes in the coal face cut by said kerf cutter. l

`3. In a mining apparatusjifin combination, a coal cutting machine-havinga kerf cutter for' cutting kerfs ina coal seam andsuppoiting means for said'kerf cutter yadjustable t'o locatesaidkerf cutter in a horizontaltop cutting position and in ahorizontal bottom cutting position, said adjustable supporting means including a supporting and adjusting element for adjusting Vsaidkerf cutter into aforesaid positions,facoal drill for drilling blast holes in the coal seam,` and supporting Y means for mounting said drill on said supporting and adjusting elementfor Concurrent adjustment therewith during adjustment of said kerf cutter, said supporting means being mounted on said supporting and adjusting element wholly independently of said kerf cutter and adjustable therewith while at all times supported .thereby into a bottom drilling positionbelow said'kerf cutter when the latter is in'its top cutting' positionand into a top drilling position above said kerf cutter when the latter is in its bottom cuttingposition.

4. In a mining apparatus, the combination with a coal cutting machine comprising agrotatable cutter head carrying a kerf cutter, said kerf cutter rotatable withk said cutter head about the head axis into different cutting planes, of a coal drill, and an adjustable supporting structuremounted on said rotatable cutter head forl supporting said coal drill independentlyl of saidv kericutter, said supporting structure adjustable4 withsaid cutter head about the head axis andlsaid supporting structure supporting said Vcoal drill for4 adjustment concurrently with said cutter head relative to the cutting machine through av wide range of drilling positions for drilling holesV at dilerent locations in the coal face' cut by said kerfcutter,

said supporting structure including elements forV supporting said coal drill and through which the drill is connected to the cutterhead of the cut-A 5.` In a miningv apparatus, the combination with a coal cuttingmachine having a rotatable cutter head` carryinga kerf cutter and rotatable to adjust said kerf cutter kinto diierent cutting planes about the' head axis,l of a coal drill, and an adjustable supportingstructure permanently mounted on said cutter head for supporting said coal drill independently of the kerf cutter, said supporting structure supporting said coal drill for concurrent swiveled adjustment with the cutter head yabout the axis of head rotation intohorizontal drilling positions above and below and at either side of. the cutter head axis to drill horizontal holes in the coal face near the mine roof and nearthe minefloor and at either side of the cutting machine, said supporting structure including elements for supporting said coal drill in any of its adjusted positions and through which the drill is always connected to the cutter head of the cutting machine during adjustment thereof into all of aforesaid adjusted positions, said supporting elements being mounted 0n said cutter head to rotate therewith to effect bodily adjustment of said drill inY an arcuate path about said head axis.

6. In a mining apparatus, the combination with a coal cutting. machine comprising a support swingable horizontally about a vertical axis and a rotatable cutter head mounted on saidhorizontally swingable support and carrying a kerf cutter, said cutter head rotatable relative to said support, to adjust said kerf 4cutter into diiferent cutting planes about the axis of head rotation, of a coal drill, and an adjustable supporting structure mounted on said cutter head in advance of said horizontally swingable support for supporting said coal drill on saidcutterY head independently of said kerf cutter, said supporting structure supporting said coal drill for adjustment withsaid cutter head about the axis of head rotation into horizontal drilling positions above Vandbelow and at either side of the cutter. head axis, said supporting structure including relatively adjustable elementsfor supporting said coal drill and through which said drill is always connected to the ycutter head of the cutting machine during adjustment thereofinto any of aforesaid drilling positions-said elements mounted on said cutter head to rotate with said head about said head axis to move said drill in an arcuate path and including an element having a mounting on said cutter head adjustable to move said drill bodily to vary the radius of such path.

7. In a mining apparatus, the combination with a coal cutting machine having a rotatable cutter head carrying a pivoted kerf cutter, of a coal drill,

Y and an adjustablel supporting structure for said coal drill mounted on said cutter head independently of said kerf cutter and relative to which the latter is swingable, said supporting structure supporting said coal drill for adjustment concurrently with-said cutter head about the' axis of headA rotation into Vhorizontaly drilling positions above and below and at either sideof said head axis, and said supporting'structure including a drill supporting element4 pivotally mounted on said cutter head to swing relative thereto and by which said coal drill iscarried in all the various positions of adjustment thereof.

8. In a mining apparatus, the combination with a coal cutting machine having a rotatable cutter head carrying a pivoted kerf cutter, of a coal drill, and an adjustable supporting structure for said coal drill mounted on said cutter head independently of said kerf cutter and relative to which the latter -is ,swingable saidsupporting structure supporting Said` @&1 drill fer adi im smcurrently with said `cutter head about,the axis 1o f head `rotation into horizontal ,drilling positions above and below and at either Ayve .for's'ad ead axis, and said supporting structk re includinga drill supporting: element pivotallyxmountled 'on said cutter head to swing. relative :thereto about an axis inthe same'graight line` with thepivot of said kerf cutter and by which said coal drill is carried in all the various positions of adjustment thereof.

9. In a mining apparatus, the combination with a coal cutting machine having a rotatable cutter head carrying a pivoted kerf cutter, of a coal drill, and an adjustable supporting structure for said coal drill mounted on said cutter head independently of said kerf cutter and relative to which the latter is swingable, said supporting structure supporting said coal drill for adjustment with said cutter head about the axis of head rotation into horizontal drilling positions above and below and at either side of said head axis, and said supporting structure including elements one of which is a drill supporting element pivotally mounted on said cutter head to swing relative thereto, and extensible power devices for adjusting elements of said supporting structure and for locking said supporting structure in its adjusted position.

10. In a mining apparatus, the combination with a coal cutting machine having a rotatable cutter head carrying a pivoted kerf cutter, of a coal drill, and an adjustable supporting structure for said coal drill mounted on said cutter head independently of said kerf cutter and relative to which the latter is swingable, said supporting structure supporting said coal drill for adjustment with said cutter head about the axis of head rotation into horizontal drilling positions above and below and at either side of said head axis, and said supporting structure including elements one of which is a drill supporting element pivotally mounted on said cutter head to swingrelative thereto about an axis coincident with the pivot of said kerf cutter, and extensible power devices for adjusting elements of said supporting structure and for locking said supporting structure fin its adjusted position.

11. In a mining apparatus, the combination with a coal cutting machine having a rotatable cutter head carrying a pivoted kerf cutter, Vof a coal drill, and an adjustable supporting structure for said coal drillV mounted on said cutter head independently of said kerf cutter and relative to which the latter is swingable, said supporting structure supporting said coal drill for adjustment with said cutter head about the axis of head rotation into horizontal drilling positions above.

and below and at either side of said'head axis, and said supporting structure including elements one of which is a drill supporting element pivotally mounted on said cutter head to swing relative thereto about an axis coincident with the pivot of said kerf cutter, and extensible power devices for adjusting elements of said supporting structure and for locking said supporting structure in its adjusted position, said power devices comprising hydraulic cylinders containing reciprocable pistons.

12. In a mining apparatus, in combination, a portable base, a cutter head mounted on said base to rotate relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutter head to swing relative thereto and adjustable with Said head about the head axis into horizontal prima mages-hess' adilli@ tion's Ito "support Said d ll on said c Y drill holes above said cutter head when said kerf cutter is `positioned below said cutter head and to drill holes below said cutter head whensaid v kerf cutter is positioned above said cutter head.

13. In a mining apparatus, in combination, a Y

portable base, a cutter head mounted on saidbase to rotate relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutter head to swing relative thereto and adjustable with said head about the headaxis into horizontal cutting positions above and below said cutter head,` a coal drill, and means for mounting said drill on said cutter head wholly independently of said kerf cutter at ythe side of said cutter head opposite from said kerf cutter, said drill mounting means being concurrently adjustable with said cutter head about the head axis during kerf cutter adjustment while wholly supported by said Y head, said mounting means being adjustable into positions to support said drill on said cutter head to drill holes above said cutter head when said kerf cutter is positioned below said cutter head and to drill holes below said cutter head when said kerf cutter is positioned above said cutter head, said drill mounting means including drill supporting means adjustable horizontally relative to said cutter head while supported by the latter and while said kerf cutter remains stationary as regards swinging movement about its pivot relative to said cutter head.

14. In a mining apparatus, in combination, a

portable base, a cutter head'mounted on said base b to rotate relative thereto about a horizontal axis, Y

a kerf cutter pivotally mounted on said cutter head to swing relative'thereto and adjustable with said head about'the head axis into horizontal cutting positions above and below said cutter head, a coal drill, and means for mountiingV said ydrill on said cutter head wholly independently of said kerf cutter at the side of said cutter head opposite from said kerf cutter, said drill mounting means being concurrently adjustable with said cutter head about the head axis during kerf cutter adjustment while wholly supported by said head,

said mounting means being adjustable into posii tions to support said drill on said cutter head to f drill holes above said cutter head when' said kerf cutter is positioned below said cutter head and to drill holes below said cutter head when said kerf cutter is positioned above said cutter head, said drill mounting means including drill supporting means adjustable vertically relative to said cutter head while supported by the latter and while said kerf cutter remains stationary as regards swinging movement about its pivot relative to said cutter head. y

15. In a mining apparatus, in combination, a

portable base, a. cutter head mounted on said base to rotate relative thereto about a horizontal axis, a kerf cutter pivotally mounted on said cutter head to swing relative thereto and adjustable with said head about the head axis into horizontal cutting positions above and below said cutter head, a coal drill, and means for mounting said drill on said cutter head wholly independently of said kerf cutter at the sideof 'saidA cutter head opposite from said kerf cutter', .said drilljmounting means being .concurrently adjustable with said' cutter head about .the head axis during'kerf cutter adijustment whilefwholly'supportedfby said head,

saidmounting means being adjustable into lpositions to support said drillonfsaid cutter head to drill holes above' said cutter head when said kerf cutter is positioned `below said cutter head4 and to .A

6 Y A aamv :drill holes below saidk cutter head when said kerf ,cutter is positioned above said cutter head, said drill mounting means including drill supporting means adjustable horizontally and vertically re1- ative to said'cutter head while supported by the latter and while'said Ykerf cutter remains stationary as regards swinging movement about its pivot relative to said cutter head.

CHARLES F; OSGOOD. 

